many boat makers quit putting hour meters on their boats because customers were pissed when their boat was out of warranty with such low hours from lack of use.
if the boat was used a normal amount, assume 50 hours per year
if the boat was used a lot, assume 100 hours per year
if the boat is only used on the 3 major holidays, assume 10 hours a year
truth is about 95% of boats get used less than 20 hours per year.